Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process

A technology of fractionation tower and naphtha, which is applied in the fields of hydrocarbon distillation and petroleum industry, etc. It can solve the problems of unutilized top circulation heat at the appropriate temperature, increase the cooling load of the system, and downgrade the use of heat, so as to improve the distribution of reaction products and increase the The effect of heat exchange final temperature and reduction of production amount

Inactive Publication Date: 2009-07-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The heat of the mid-section reflux is also seriously downgraded
[0006] 3. Part of the top cycle heat at a suitable temperature is not used, which not only causes heat loss, but also increases the cooling load of the system
In the existing process, in order to ensure the temperature of the top cycle returning to the tower, air cooling is used as an adjustment means to directly cool the top cycle at 95°C after a heat exchange with deoxygenated water to 80°C and return to the tower, about 100×104Kcal / h calories are wasted

Method used

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  • Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process
  • Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process
  • Auxiliary fractional tower and its gasoline catalyzing and olefine reducing modification process

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Embodiment 1

[0043] Such as Figure 4 As shown, the auxiliary fractionation tower of the present invention includes a tower body 1, and 16 trays are installed in the tower body 1 horizontally from top to bottom, and the whole tower body 1 is divided into 17 layers, the 17th layer It is a washing section, and a herringbone baffle 12 is installed in the vertical direction of this section, and the lower tower body of the herringbone baffle 12 is respectively provided with a reaction oil gas feed port 9, a stirring steam feed port 10, and a herringbone baffle 12. The upper tower body is provided with an oil slurry inlet 11 (externally connected to the main fractionation tower), and the bottom of the tower body 1 is provided with an oil slurry outlet 34, which is connected with the main fractionation tower through the oil slurry extraction pump 31 and the oil slurry heat exchanger 48 , the tray of the 16th tray 1-16 is provided with a middle section and a diesel outlet 4, and the 13th tray 1-13...

Embodiment 2

[0065] The feed temperature of the high-temperature reaction oil gas in the first step is 400°C, and the feed pressure is 0.20MPa; A part of the bottom of the liquid tank is pumped out directly to the absorption stabilization system, and the rich gas at 30°C is pumped out from the top of the liquid separation tank to also directly go to the absorption stabilization system. The oil and gas output pressure at the top of the tower is 0.16MPa; The return temperature is 80°C to ensure the heat balance of the whole tower; the return temperature of the middle section of the reflux controlled in the fourth step is 170°C to ensure the heat balance of the whole tower; all the other conditions are the same as in Embodiment 1.

Embodiment 3

[0067] The feed temperature of the high-temperature reaction oil gas in the first step is 450°C, and the feed pressure is 0.23MPa; A part is pumped out from the bottom of the liquid tank to directly absorb and stabilize the system, and the rich gas at 35°C is pumped out from the top of the liquid separation tank to directly absorb and stabilize the system. The oil and gas output pressure at the top of the tower body is 0.22MPa; The return temperature is 100° C. to ensure the heat balance of the entire tower; the fourth step controls the return temperature of the mid-section reflux to be 190° C. to ensure the heat balance of the entire tower; the remaining conditions are the same as in Embodiment 1.

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Abstract

The invention discloses an auxiliary fractionation tower and its catalytic gasoline olefin-reducing modification method. The tower body is equipped with 16 trays, and the whole tower body is divided into 17 layers. The 17th layer is equipped with a herringbone baffle, and It is equipped with reaction oil and gas inlet, stirring steam inlet, oil slurry inlet, oil slurry outlet, the 16th tray is equipped with a middle section and a diesel outlet, and the 13th tray is equipped with a middle section return feed The fourth tray is provided with a top circulation outlet, the first tray is provided with a top reflux feed inlet and a top circulation return tower feed inlet, and the top of the tower body is connected to a separator tank through a heat exchanger. The structure of the tower is simplified, and the catalytic gasoline olefin reduction modification method realized establishes a new heat exchange process that uses the heat of the fractionation system to heat the crude gasoline step by step, which realizes the optimization of system energy consumption and reduces the yield of coke and dry gas. The energy quality and heat utilization efficiency of the gasoline reforming process are improved, and the device energy consumption of the auxiliary fractionation system is reduced.

Description

technical field [0001] The invention relates to the technical field of heavy oil catalytic cracking in the oil refining industry, in particular to an auxiliary fractionation tower and a catalytic gasoline olefin-reducing upgrading method thereof. Background technique [0002] In the secondary processing technology of my country's oil refining industry, the catalytic cracking process occupies an extremely important position. Most of the gasoline and diesel in the domestic market come from catalytic cracking; 1 / 3 of the total energy consumption of the refining unit. In order to meet the requirements of increasingly heavy crude oil, stricter oil quality indicators and more diesel, propylene and liquid hydrocarbons, the research and application of new catalytic cracking technologies have been very active in recent years. "Catalytic gasoline auxiliary reactor modification and olefin reduction technology" is an example. The goal of this technology is to reduce the olefin content ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G7/00
Inventor 李亚军赵丽华李国庆
Owner SOUTH CHINA UNIV OF TECH
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